I've been wanting another fish to put in my tank lately, but I can't think of one. More schooling fish would be nice but I don't know what other schooling fish are there that I haven't seen in my FS's. I could go for one or two that have a personality unlike many of the schooling ones so far in my tank, but like I said above I really can't think of one to put in there. One fish that I have thought about though is a black ghost knife because of the other threads. I've also seen some in my LFS that are about 17" long in a ~275gal that don't do anything to the oscars and plecos in the tank and just stay on one side of the tank. I probably would get one if they are peaceful with my fish and if my parents allow it...lol. Any ideas? Otherwise, I'll go get a couple more moon crabs since they're pretty fun to watch when they are walking around. 